#define _CRT_SECURE_NO_WARNINGS 1
#include <stdio.h>
#include <ctype.h>


int main()
{
	int ret = islower('A');
	printf("%d\n", ret);
	ret = islower('a');
	printf("%d\n", ret);
	
	ret = islower('0');
	printf("%d\n", ret);
	
	return 0;
}